Solved UPSC CDS/OTA Question
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Q · Circulatory Systemmedium · 45s
Which vessel has valves to prevent backflow?
TopicCirculatory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Veins, especially in the limbs, contain bicuspid valves formed from tunica intima. These valves ensure unidirectional flow toward the heart, aided by skeletal muscle contractions during movement.
Final Answer: Option B - Veins